package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.ICategoryService;
import com.itheima.reggie.service.IDishService;
import com.itheima.reggie.service.ISetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ICategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements ICategoryService {

    @Autowired
    private IDishService dishService;
    @Autowired
    private ISetmealService setmealService;
    /**
     * 根据菜品id删除分类,删除之前需要进行判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        //1.添加查询条件,根据分类id进行查询菜品Dish数据
        LambdaQueryWrapper<Dish> dlqw = new LambdaQueryWrapper<>();
        dlqw.eq(Dish::getCategoryId,id);
        int count1 = dishService.count(dlqw);

        //如果已经关联,抛出一个业务异常
        if(count1 >0){
            throw new CustomException("当前菜品下关联了菜品,不能删除");
        }

        //2.查询当前分类是否关联了套餐,如果已经关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> slqw = new LambdaQueryWrapper<>();
        slqw.eq(Setmeal::getCategoryId,id);
        int count2 = setmealService.count(slqw);

        if(count2 >0){
            throw new CustomException("当前分类关联了套餐,无法删除");

        }

        //正常删除分类
        super.removeById(id);
    }
}